ADOPTED LEVELS, GAMMAS for 9Be

Authors: J.H. Kelley, C.G. Sheu, J.L. Godwin, Et Al. |  Citation: Nucl. Physics A745 155 (2004) |  Cutoff date: 31-Mar-2004 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-1068.0 keV 9S(n)= 1664.54 keV 8S(p)= 16886.32 keV 9Q(α)= -2308 keV 20
Reference: 2012WA38

References:
  A  9Li β- decay  B  6Li(t,n),(t,p)
  C  7Li(d,γ)  D  7Li(d,p)
  E  7Li(3He,p),(3He,pγ)  F  7Li(3He,PN)
  G  7Li(α,d)  H  7Li(6Li,α)
  I  9Be(γ,γ’)  J  9Be(γ,n),(γ,α),(γ,2α)
  K  9Be(γ,p),(γ,d),(γ,t)  L  9Be(E,E),(E,E’),(E,EN),(E,εp)
  M  9Be(π++),9Be(π--)  N  9Be(n,n’),9Be(n,2n)
  O  9Be(p,p),(p,p’)  P  9Be(d,d),(d,d’)
  Q  9Be(3He,3He’),9Be(3He,2α)  R  9Be(α,α’),9Be(α,2α)
  S  9Be(6Li,6Li’),9Be(7Li,7Li’)  T  10Be(d,t)
  U  10B(E,E’p)  V  10B(d,3He)
  W  10B(t,α)  X  11B(p,3He)
  Y  11B(d,α),11B(d,AN)  Z  12C(n,α),12C(n,NA)
  a  13C(3He,7Be) 

General Comments:

See other reaction references in (1988Aj01).

For states belonging to E1 and E2 giant resonances see footnote j in Table 9.8 of (1984Aj01).

Gammas: See Tables 9.3, 9.4, 9.5, 9.9 and 9.10 in (2004Ti06). See also Montgomery et al. Can. J. Phys. 62 (1984) 764.

Q-value: Note: Current evaluation has used the following Q record










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
      0.0A C E GHI  LMNOPQRSTUVWXYZa 3/2- STABLE      
   1684 20   C E GH J L NOPQR T  W YZ  1/2+ 214 keV 5 
% IT = 1.4×10-6
% n ≈ 100
   1684 20 
  100
E1
      0.0
3/2-
   2429.4 13 A C EFGH J LMNOPQRSTUVWXYZa 5/2- 0.78 keV 13 
% IT = 1.2×10-4
% n > 7.0 10
% α > 1
   2429.0 13 
  100
M1+E2
      0.0
3/2-
      2.78E+3 12 A C E         O           a 1/2- 1.10 MeV 12 
% n ≈ 100
     
   3049 9     EF H J L NOPQR T  WXYZ  5/2+ 282 keV 11 
% IT = 1×10-6
% n > 87
   3048 9 
 
E1
      0.0
3/2-
   4704 25   C EF   J L  OPQR      Y a (3/2)+ 743 keV 55 
% IT > 1.6×10-6
% n < 100
   4703 25 
 

      0.0
3/2-
      5.59E3 10               O     U       (3/2-) 1.33 MeV 36        5.59E3 10 
 

      0.0
3/2-
   6380 60     EF H JK MNOPQRS UV   Z  7/2- 1.21 MeV 23 
% IT > 6.8×10-8
% n < 100
   6378 60 
 
E2
      0.0
3/2-
   6760 60     EF   JK   O             9/2+ 1.33 MeV 9 
% IT > 0
% n < 100
   6757 60 
 
E2
      0.0
3/2-
   7940 80 A             O     U       (5/2-) ≈ 1000 keV      
  11282 22 A   EF   J L  O  R  UVW     (7/2-) 575 keV 50 
% n > 15
     
  11810 20 A    F H J             X  a 5/2- 400 keV 30 
% IT > 0
% n < 100
  11802 20 
 

      0.0
3/2-
  13790 30     E  H   L  O        X    (5/2-,7/2-) 590 keV 60 
% IT > 0
% n < 100
  13779 30 
 

      0.0
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  14392.2 18     E   I  L  O Q     WX    3/2- 365 eV 29 
% IT = 4.4
% n = 52.6
% α = 43
   9683 25 
  11336 9 
  11954.3 22 
  14380.0 18 
   11.2 24 
   16.1 34 
  100 5 
   88.3 44 
E1
E1
M1
M1
   4704
   3049
   2429.4
      0.0
(3/2)+
5/2+
5/2-
3/2-
     14.48E+3 9                     U W     (5/2-) ≈ 800 keV      
  15100 50        H   L  O        X    % IT > 0
     
  15970 30            L  O        X    ≈ 300 keV
% IT > 0
  15955 30 
 

      0.0
3/2-
  16671 8     E      L  O       W     (5/2+) 41 keV 4 
% IT > 0
  16654 8 
 

      0.0
3/2-
  16977.1 5   CD    I  L  O             1/2- 389 eV 10 
% IT = 6.1
% D = 15.9
% p ≈ 3.1
% n < 74
% α < 62
  12264 25 
     14.19E3 12 
  14535.1 14 
  15279 20 
  16959.9 5 
   12.9 13 
   13.3 42 
    3.3 7 
   11.8 6 
  100 6 
E1
M1
E2
E1
M1
   4704
      2.78E+3
   2429.4
   1684
      0.0
(3/2)+
1/2-
5/2-
1/2+
3/2-
  17300 5    D     J L  O             (5/2)- 195 keV
% IT > 4.6×10-5
% p > 0
% D > 0
% α > 0
% n < 100
  17282 5 
 

      0.0
3/2-
  17495 5    D       L  O     U       (7/2)+ 47 keV
% IT > 1.7×10-5
% p > 0
% D > 0
% α > 0
% n < 100
  17476 5 
 

      0.0
3/2-
  18020 50            L                % IT > 0
     
  18580 40    D       L                % IT > 0
% p > 0
% D > 0
% α > 0
% n < 100
     
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     18.65E+3 5 ?              O             (5/2-) 0.3 MeV 1 
% p ≤ 100
     
  19200 50    D   H J                  310 keV 80 
% p > 0
% D > 0
% 3H > 0
% n < 100
     
  19465 45          J L  O             (9/2+) 0.6 MeV 3 
% IT > 0
     
     19.9E+3 2 ?         J                  % IT > 0
% n ≤ 100
     
  20510 30 ? B D     J    O             0.6 MeV 1 
% IT > 0
% D > 0
% p < 100
     
  20750 30          J L  O             0.68 MeV 9 
% IT > 0
% p > 0
% 3H > 0
% n < 100
     
     21.4E+3 2 ?         J                  % IT > 0
% n < 100
     
     22.4E+3 2 ?         J    O             % IT > 0
% n < 100
     
     23.8E+3 2 ?         J                  % IT > 0
% n < 100
     
     27.0E+3 5          J                  % IT > 0
% n < 100
     

E(γ): From level energy difference; recoil correction applied.

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Additional Gamma Data:











E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityAdditional Data
   1684 1/2+ 214 keV 5 
% IT = 1.4E-6
% n ≈ 100
   1684 20 E1B(E1)(W.u.)=0.21 9
   2429.4 5/2- 0.78 keV 13 
% IT = 1.2E-4
% n > 7.0 10
% α > 1
   2429.0 13 M1+E2B(E2)(W.u.)=24.4 18, B(M1)(W.u.)=0.30 3
   3049 5/2+ 282 keV 11 
% IT = 1E-6
% n > 87
   3048 9 E1B(E1)(W.u.)=3.6E-2 30
   6380 7/2- 1.21 MeV 23 
% IT > 6.8E-8
% n < 100
   6378 60 E2B(E2)(W.u.)=8.5 36
  14392.2 3/2- 365 eV 29 
% IT = 4.4
% n = 52.6
% α = 43
   9683 25 E1B(E1)(W.u.)=3.1E-3 7
3/2- 365 eV 29 
% IT = 4.4
% n = 52.6
% α = 43
  11336 9 E1B(E1)(W.u.)=2.8E-3 6
3/2- 365 eV 29 
% IT = 4.4
% n = 52.6
% α = 43
  11954.3 22 M1B(M1)(W.u.)=0.208 20
3/2- 365 eV 29 
% IT = 4.4
% n = 52.6
% α = 43
  14380.0 18 M1B(M1)(W.u.)=0.106 6
  16977.1 1/2- 389 eV 10 
% IT = 6.1
% D = 15.9
% p ≈ 3.1
% n < 74
% α < 62
  12264 25 E1B(E1)(W.u.)=4.0E-3 6
1/2- 389 eV 10 
% IT = 6.1
% D = 15.9
% p ≈ 3.1
% n < 74
% α < 62
     14.19E3 12 M1B(M1)(W.u.)=3.7×10-2 11
1/2- 389 eV 10 
% IT = 6.1
% D = 15.9
% p ≈ 3.1
% n < 74
% α < 62
  14535.1 14 E2B(E2)(W.u.)=0.94 21
1/2- 389 eV 10 
% IT = 6.1
% D = 15.9
% p ≈ 3.1
% n < 74
% α < 62
  15279 20 E1B(E1)(W.u.)=1.9E-3 2
1/2- 389 eV 10 
% IT = 6.1
% D = 15.9
% p ≈ 3.1
% n < 74
% α < 62
  16959.9 5 M1B(M1)(W.u.)=0.165 10

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
   16841/2+ 214 keV 5 
% IT = 1.4×10-6
% n ≈ 100
Γγ=0.30 eV 12 (1987Ku05).
E(level): Γγ=0.30 eV 12 (1987Ku05).
   2429.45/2- 0.78 keV 13 
% IT = 1.2×10-4
% n > 7.0 10
% α > 1
%n to 8Be g.s.=7.0 10 7Li(3He,pn) (1966Ch20).
E(level): %n to 8Be g.s.=7.0 10 7Li(3He,pn) (1966Ch20).
      2.78E+31/2- 1.10 MeV 12 
% n ≈ 100
%n decay mainly to 8Be g.s. From 9Li β-decay (1970Ch07).
E(level): %n decay mainly to 8Be g.s. From 9Li β-decay (1970Ch07).
   30495/2+ 282 keV 11 
% IT = 1×10-6
% n > 87
%n to 8Be g.s.=87 13 from 7Li(3He,pn) (1966Ch20,1968Co08).
E(level): %n to 8Be g.s.=87 13 from 7Li(3He,pn) (1966Ch20,1968Co08).
   4704(3/2)+ 743 keV 55 
% IT > 1.6×10-6
% n < 100
%n to 8Be g.s.=13 4 from 7Li(3He,pn) (1968Co08).
E(level): %n to 8Be g.s.=13 4 from 7Li(3He,pn) (1968Co08).
      5.59E3(3/2-) 1.33 MeV 36  E(level): Decay mode not specified.
   63807/2- 1.21 MeV 23 
% IT > 6.8×10-8
% n < 100
%n to 8Be g.s. |<2; to 8Be*(3010)=55 14.
E(level): %n to 8Be g.s. |<2; to 8Be*(3010)=55 14.
   7940(5/2-) ≈ 1000 keV Jπ=(5/2-) from 10Be(e,e’p). Also see supporting information in (1993Ch06) discussion on β-decay; this level had previously been assigned Jπ=(1/2-) based on branching ratios observed in β-decay see (1988Aj01) Table 9.7.
E(level): Jπ=(5/2-) from 10Be(e,e’p). Also see supporting information in (1993Ch06) discussion on β-decay; this level had previously been assigned Jπ=(1/2-) based on branching ratios observed in β-decay see (1988Aj01) Table 9.7. Decay mode not specified.
  11282(7/2-) 575 keV 50 
% n > 15
%n to 8Be g.s.=2|<; to 8Be*(3010)=14 4.
E(level): %n to 8Be g.s.=2|<; to 8Be*(3010)=14 4.
  118105/2- 400 keV 30 
% IT > 0
% n < 100
T=1/2
%n to 8Be g.s.=3|<; to 8Be*(3010)=12 4.
E(level): %n to 8Be g.s.=3|<; to 8Be*(3010)=12 4.
  13790(5/2-,7/2-) 590 keV 60 
% IT > 0
% n < 100
T=1/2
Jπ: from 9Be(p,p’) (1991Di03). Also see 11B(p,3He) where (3/2-) was suggested.
E(level): Jπ: from 9Be(p,p’) (1991Di03). Also see 11B(p,3He) where (3/2-) was suggested.
  14392.23/2- 365 eV 29 
% IT = 4.4
% n = 52.6
% α = 43
T=3/2, Γγ0=6.6 4
(1976Mc10) measured the branching ratios Γn0/Γ=0.028 21 and Γn1/Γ=0.50 11; these can Be used with Γ=365 eV 29 to deduce Γn=192 eV 43.
E(level): (1976Mc10) measured the branching ratios Γn0/Γ=0.028 21 and Γn1/Γ=0.50 11; these can Be used with Γ=365 eV 29 to deduce Γn=192 eV 43.
     14.48E+3(5/2-) ≈ 800 keV Jπ: from 10B(e,e’p).
E(level): Jπ: from 10B(e,e’p). Decay mode not specified.
  15100 % IT > 0
E(level): Decay mode not specified.
  15970 ≈ 300 keV
% IT > 0
T=1/2
E(level): Decay mode not specified.
  16671(5/2+) 41 keV 4 
% IT > 0
E(level): Decay mode not specified.
  18020 % IT > 0
E(level): Decay mode not specified.
     18.65E+3(5/2-) 0.3 MeV 1 
% p ≤ 100
t=(3/2).
  19465(9/2+) 0.6 MeV 3 
% IT > 0
E(level): Decay mode not specified.

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Additional Gamma Comments:

E(level)E(gamma)Comments

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